I'm not trying to cause an argument here, I don't feel strongly about this issue at all, so please don't take any of this personally. It's not a big deal, and not really worth argung about, but hey - this IS the Internet

But I gotta say you're not really convincing me. I'll concede that these bullets are far superior to the long range hunters out there (+500yds), if you'll concede that 90+% of hunters who use these bullets aren't long range shooters (bulls**t aside)
'Cause sub-MOA accuracy is so terribly important in a hunting rifle. If you can put a bullet into a pie plate at the range you're hunting at, the difference is nil.
That's not been my experience. Also see my first point.
Sure, but this is a small portion of the people who use these bullets. Far more hunters think themselves 500-yarders than actually are.
True, but 'easy expansion' is directly proportional to 'decreased penetration.' Plus, see my previous point.
Depends on which particular plastic tip we're talking about. As you pointed out earlier, there are a wide variety of them available. As a general rule of thumb though, the all offer faster/earlier expansion, which also means less penetration. On large game, a bullet does not need to expand at all for the first few inches.
Again, some are, some aren't. But who cares - these are hunting bullets, not high-volume match/varmint bullets. You won't NEED many of them, so your costs stay reasonable whichever way you go.
May be more fair to say they WERE gimmicks, decades ago. Gimmicks from that long ago that are still around have established themselves very well, and moved from 'gimmick' status to 'mature, tested and established' status. Indeed the Partition has become the benchmark big game bullet. This is not to say that the design can't be improved upon, or bested by another. But IMHO it hasn't, yet. New designs show a lot of promise and given some time to establish themselves and build a field-proven track record.